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//===- unittests/Frontend/CompilerInstanceTest.cpp - CI tests -------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/ToolOutputFile.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
namespace {
TEST(CompilerInstance, DefaultVFSOverlayFromInvocation) {
// Create a temporary VFS overlay yaml file.
int FD;
SmallString<256> FileName;
ASSERT_FALSE(sys::fs::createTemporaryFile("vfs", "yaml", FD, FileName));
ToolOutputFile File(FileName, FD);
SmallString<256> CurrentPath;
sys::fs::make_absolute(CurrentPath, FileName);
// Mount the VFS file itself on the path 'virtual.file'. Makes this test
// a bit shorter than creating a new dummy file just for this purpose.
const std::string CurrentPathStr = CurrentPath.str();
const std::string FileNameStr = FileName.str();
const char *VFSYaml = "{ 'version': 0, 'roots': [\n"
" { 'name': '%s',\n"
" 'type': 'directory',\n"
" 'contents': [\n"
" { 'name': 'vfs-virtual.file', 'type': 'file',\n"
" 'external-contents': '%s'\n"
" }\n"
" ]\n"
" }\n"
File.os() << format(VFSYaml, CurrentPathStr.c_str(), FileName.c_str());
// Create a CompilerInvocation that uses this overlay file.
const std::string VFSArg = "-ivfsoverlay" + FileNameStr;
const char *Args[] = {"clang", VFSArg.c_str(), "-xc++", "-"};
IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
CompilerInstance::createDiagnostics(new DiagnosticOptions());
std::shared_ptr<CompilerInvocation> CInvok =
createInvocationFromCommandLine(Args, Diags);
if (!CInvok)
FAIL() << "could not create compiler invocation";
// Create a minimal CompilerInstance which should use the VFS we specified
// in the CompilerInvocation (as we don't explicitly set our own).
CompilerInstance Instance;
// Check if the virtual file exists which means that our VFS is used by the
// CompilerInstance.
TEST(CompilerInstance, AllowDiagnosticLogWithUnownedDiagnosticConsumer) {
auto DiagOpts = new DiagnosticOptions();
// Tell the diagnostics engine to emit the diagnostic log to STDERR. This
// ensures that a chained diagnostic consumer is created so that the test can
// exercise the unowned diagnostic consumer in a chained consumer.
DiagOpts->DiagnosticLogFile = "-";
// Create the diagnostic engine with unowned consumer.
std::string DiagnosticOutput;
llvm::raw_string_ostream DiagnosticsOS(DiagnosticOutput);
auto DiagPrinter = std::make_unique<TextDiagnosticPrinter>(
DiagnosticsOS, new DiagnosticOptions());
CompilerInstance Instance;
IntrusiveRefCntPtr<DiagnosticsEngine> Diags = Instance.createDiagnostics(
DiagOpts, DiagPrinter.get(), /*ShouldOwnClient=*/false);
Diags->Report(diag::err_expected) << "no crash";
ASSERT_EQ(DiagnosticsOS.str(), "error: expected no crash\n");
} // anonymous namespace